ISC kernel symbol 'machenv'?

[Tom Neff]

Can someone tell me what 'machenv' does in the Interactive kernel?  I
got the Archive Viper drivers on floppy but after I install them on my
non-ISC UNIX the kernel build bombs on the undefined symbol 'machenv'.
I don't mind dummying it up but I have to know how it's defined and what
it's supposed to return or contain.
-- 
"NASA Awards Acronym Generation       :(%( :  Tom Neff
System (AGS) Contract For Space       : )%):  tneff%bfmny at UUNET.UU.NET
Station Freedom" - release 1989-9891  :(%( :  ...!uunet!bfmny0!tneff